![]() Have you set up the projector with your laptop but are having problems with the display? You can easily customize display settings on your laptop to give you the best possible result with the following steps. Perhaps one of those settings also disables screen sharing over HDMI? I've looked through them and tried changing back quite a few, but nothing is helping so far.Your Mac can also automatically detect your projector, but you will still need to follow the above method if you want to change the display settings. Newer models of Mac don’t have an HDMI port, so you will need an adapter to connect it to your projector. Thus, I wonder, are there any settings in the operating system that would disable the HDMI output? A few weeks ago, I changed a number of settings in Settings -> Privacy to disable unnecessary reporting to Microsoft and to disable unnecessary sharing of system resources with apps. Those options disappear when the cable is unplugged. Also, only when the HDMI cable is plugged in, I have additional options on the Display settings page, about what to do with the second display, such as mirror the primary display. When the cable is unplugged, that disappears. When I enter Settings on my laptop (Start -> Settings -> System -> Display) while the HDMI cable is connected, I get a blue rectangle on the Display settings page that has a "1/2" displayed on it. ![]() We tried uninstalling and reinstalling my video driver. We tried rebooting both laptop and projector in various orders. I tried my laptop again, and it still didn't work. ![]() I tried a colleague's laptop, and the projector worked fine with that other laptop. ![]() ![]() Now, almost two years later, when I tried to do that again, the projector showed only an empty blue screen. When I taught at school before coronavirus, I used to plug an HDMI cable into my laptop, and the machine in the classroom would share my laptop's screen image through the projector. ![]()
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